BSEE Safety Alert No. 510
Blackout and Weather-Driven EDS Incidents Underscore the Need for Stronger Operational Discipline
We continue our series of analyses of Safety Alerts from the BSEE (Bureau of Safety and Environmental Enforcement). In each case we review the incident through the lens of the SEMS (Safety and Environmental Management System) rule. There are 17 elements to that rule.
What Happened
BSEE Safety Alert Number 510 (Blackout and Weather-Driven EDS Incidents Underscore the Need for Stronger Operational Discipline) is available here.
Recently, two separate Emergency Disconnect Sequence (EDS) events occurred on a dynamically positioned drillship. Both incidents resulted in pollution events and required emergency actions to protect personnel, equipment, and subsea infrastructure. The investigations identified significant human factors contributing to the events, underscoring the need for improved operational discipline and procedural compliance across the offshore industry.
Two separate incidents are described.
SEMS Analysis
Following are the SEMS management elements. The ones that deserve attention with respect to this incident are highlighted.
General
Safety and Environmental Information
Hazards Analysis
Management of Change
Operating Procedures
Safe Work Practices
Training
Mechanical Integrity (Assurance of Quality and Mechanical Integrity of Critical Equipment)
Pre-startup Review
Emergency Response and Control
Investigation of Incidents
Auditing (Audit of Safety and Environmental Management Program Elements)
Recordkeeping (Records and Documentation) and additional BSEE requirements
Stop Work Authority (SWA)
Ultimate Work Authority (UWA)
Employee Participation Plan (EPP)
Reporting Unsafe Working Conditions
Safe Work Practices
This is the clearest and strongest contributor.
The damper maintenance task was treated as ‘routine’ and performed without a pre-task briefing.
Personnel actuated the wrong control panel because critical controls were unlabeled and unprotected.
There was no supervision, no confirmation of communication, and no barrier preventing inadvertent operation.
All of these are core Safe Work Practices failures.
Hazards Analysis
The first incident had no formal review, authorization, or JSA despite involving critical equipment.
The second incident shows inadequate weather hazard recognition and over-reliance on forecasts without real-time validation.
Both incidents demonstrate weak identification and evaluation of hazards before the work began.
Training
The alert explicitly states there was no structured process to confirm training or competence for the personnel performing the work.
The able seaman in the first incident did not understand which panel was correct, and the team lacked the training needed for clear closed-loop communication.
In the weather-driven event, real-time weather interpretation skills were insufficient.
